What distinguishes Canon from Nikon? Having used both services for a few months, I would say I only post "artsy" photos to Instagram, ruthlessly filtering on a

What distinguishes Canon from Nikon? Having used both services for a few months, I would say I only post "artsy" photos to Instagram, ruthlessly filtering on aesthetics while I find myself posting "inside jokes" to close friends on Path. It's probably less interesting to quibble about how these apps are different than it is to ask why are the apps taking off now in the first place? Is the next generation of photography hardware agnostic, relying instead on the social features? Overall, what do people take more photos of: art or their friends? If that is the case, betting on the Facebook guys may not be such a bad move...